HKT蛋白与植物耐盐性研究进展

摘要

盐胁迫是一种严重影响植物生长的非生物胁迫,植物在长期进化过程中形成了各种机制来抵御和适应盐胁迫。高亲和性钾离子转运蛋白（HKT）是植物中普遍存在的一类蛋白,对高等植物体内Na＋再循环,维持植株地上部特别是叶片中的低Na＋浓度和高K＋/Na＋具有重要作用。本研究对HKT蛋白的分子特性、结构与功能及其与植物耐盐性的关系进行了综述。%Salinity stress is one of the major factors influencing plant growth,during the long-term natural selection.Plants have formed various mechanisms to cope with salinity stress.High-affinity K+ transporters(HKT) wildly exist in plants.They might make a significant contribution to Na+ recycle in higher plants and play an important role in maintaining lower Na+ concentration,higher K+/Na+ ratio in higher plant,especially in leaves.Subjects regarding molecular feature,structure and function of HKT transporter,and its relationship with plant salt tolerance are summarized in this review.